package com.mypack.crm.handler;

import com.mypack.crm.annotation.ResponseResult;
import com.mypack.crm.utils.Result;
import com.mypack.crm.utils.ResultUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

@Slf4j
@ControllerAdvice
public class ResponseResultHandler implements ResponseBodyAdvice<Object> {
    @Override
    public boolean supports(MethodParameter returnType, Class<? extends HttpMessageConverter<?>> converterType) {
        // 获取方法上的注解
        ResponseResult annotation = returnType.getMethodAnnotation(ResponseResult.class);
        if (null != annotation) {
            return true;
        }
        // 获取类上的注解
        annotation = returnType.getDeclaringClass().getAnnotation(ResponseResult.class);
        if (null != annotation) {
            return true;
        }
        return false;
    }

    @Override
    public Object beforeBodyWrite(Object body, MethodParameter returnType, MediaType selectedContentType, Class<? extends HttpMessageConverter<?>> selectedConverterType, ServerHttpRequest request, ServerHttpResponse response) {
        if (body instanceof Result) {
            return body;
        }
        return ResultUtils.success(body);
    }
}
